JP3309289B2 - Radiation shielding concrete structure - Google Patents
Radiation shielding concrete structureInfo
- Publication number
- JP3309289B2 JP3309289B2 JP12921793A JP12921793A JP3309289B2 JP 3309289 B2 JP3309289 B2 JP 3309289B2 JP 12921793 A JP12921793 A JP 12921793A JP 12921793 A JP12921793 A JP 12921793A JP 3309289 B2 JP3309289 B2 JP 3309289B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete structure
- crack
- wall
- radiation
- generating member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Building Environments (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、核融合施設、その他放
射線を扱う種々の研究、実験施設等において、コンクリ
ートのひびわれによる放射線の漏洩を防止することがで
きる放射線遮蔽用コンクリート構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation shielding concrete structure capable of preventing radiation from leaking due to cracks in concrete in a nuclear fusion facility, various other research and experimental facilities handling radiation.
【０００２】[0002]
【従来の技術】放射線を遮蔽するためのコンクリート構
造においては、壁、スラブとも厚さを２ｍの放射線遮蔽
コンクリートとしており、セメントの水和熱による温度
上昇によりコンクリート構造にひびわれが発生し、そこ
から放射線が外部に漏洩するという問題を防止してい
る。特に、１階の立ち上がり壁は放射線を安全に管理す
る上で最も重要な壁であり、事前に十分な対策を検討し
ておく必要がある。そのために従来は、構造体の形状、
施工計画、気象条件を適切に評価したモデルにより温度
解析を行い、温度性状、応力状態を数量的に把握し、ひ
びわれの発生の可能性を皆無にするようにしている。2. Description of the Related Art In a concrete structure for shielding radiation, both walls and slabs are made of radiation shielding concrete having a thickness of 2 m, and the concrete structure cracks due to a rise in temperature due to the heat of hydration of cement. This prevents the problem of radiation leaking outside. In particular, the rising wall on the first floor is the most important wall for safely managing radiation, and it is necessary to consider sufficient measures in advance. Therefore, conventionally, the shape of the structure,
Temperature analysis is performed using a model that properly evaluates the construction plan and weather conditions, and the temperature properties and stress state are grasped quantitatively to eliminate the possibility of cracks.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の方式は、ひ
びわれの発生を防止するという点で有効な方式ではある
が、解析手法が複雑であるという問題を有している。こ
れに対して、本発明は、コンクリート構造の所定位置
に、品質を損なうことのないクラックを意図的に発生さ
せ、放射線源を直接見通せないようにすることにより、
放射線を安全に管理することができる放射線遮蔽用コン
クリート構造を提供することを目的とする。The above-mentioned conventional system is an effective system in preventing the occurrence of cracks, but has a problem that the analysis method is complicated. On the other hand, the present invention intentionally generates cracks at a predetermined position in the concrete structure without deteriorating the quality, so that the radiation source cannot be seen directly,
It is an object of the present invention to provide a radiation shielding concrete structure capable of safely managing radiation.
【０００４】[0004]
【課題を解決するための手段】そのために本発明の放射
線遮蔽用コンクリート構造は、コンクリート構造の壁３
の所定位置内側および外側に配設されるプレート形状の
クラック発生部材４ａ、４ｂを備え、両クラック発生部
材４ａ、４ｂは互いに壁３の外面から壁３の内部に向か
って延び、かつ、その先端を間隔を離して対向するよう
に配設されるとともに、両クラック発生部材４ａ、４ｂ
は、発生するクラックが、直接、放射線源２を見通せな
いように、水平方向に所定の距離Ｌだけずらして配置さ
れることを特徴とする。さらに、クラック発生部材４
ａ、４ｂの外側に目地部材８を設けるようにしてもよ
い。なお、上記構成に付加した番号は、本発明の理解を
容易にするために図面と対比させるためのもので、これ
により本発明の構成が何ら限定されるものではない。For that purpose, the concrete structure for radiation shielding according to the present invention comprises a concrete structure wall 3.
A plate-shaped crack generating member 4a, 4b disposed inside and outside a predetermined position of the wall 3, both crack generating members 4a, 4b extend from the outer surface of the wall 3 toward the inside of the wall 3, In addition, both the crack generating members 4a, 4b
Is characterized in that the generated cracks are arranged shifted by a predetermined distance L in the horizontal direction so that the radiation source 2 cannot be seen directly. Further, the crack generating member 4
The joint member 8 may be provided outside of a and 4b. The numbers added to the above configuration are for comparison with the drawings to facilitate understanding of the present invention, and the configuration of the present invention is not limited by this.
【０００５】[0005]
【作用】本発明においては、内側のクラック発生部材４
ａと外側のクラック発生部材４ｂ間にクラックを意図的
に発生させ、クラック発生部材４ａとクラック発生部材
４ｂは、水平方向に距離Ｌだけずらして配置されている
ため、図２に示すように、発生するクラック１１が、直
接、放射線源２を見通せないようになっているため、放
射線の漏洩を防止できる。According to the present invention, the inner crack generating member 4 is provided.
a and the crack generating member 4b is intentionally generated between the crack generating member 4a and the outer crack generating member 4b, and the crack generating member 4a and the crack generating member 4b are horizontally displaced by a distance L, as shown in FIG. Since the generated crack 11 cannot directly see through the radiation source 2, it is possible to prevent radiation from leaking.
【０００６】[0006]
【実施例】以下、本発明の実施例を図面を参照しつつ説
明する。図１は本発明の放射線遮蔽用コンクリート構造
の１実施例を示し、図１（Ａ）は建物全体の水平断面
図、図１（Ｂ）は図１（Ａ）のＢ部の拡大断面図、図１
（Ｃ）は図１（Ｂ）のＣ−Ｃ線に沿って矢印方向に見た
断面図、図２はクラックの発生状態を示す図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a radiation shielding concrete structure according to the present invention. FIG. 1 (A) is a horizontal sectional view of the whole building, FIG. 1 (B) is an enlarged sectional view of a portion B in FIG. 1 (A), FIG.
1C is a cross-sectional view taken along the line CC of FIG. 1B in the direction of the arrow, and FIG. 2 is a view showing a state of occurrence of cracks.
【０００７】図１（Ａ）において、建物１は、例えば、
平面４５ｍ×７５ｍ、高さ３５ｍの空間を２ｍ厚の床、
２ｍ厚の壁、１．３ｍ厚の天井といったマスコンクリー
トで構成する巨大ボックスとなっている。建物１内には
放射線源２が配置され、壁３内の所定位置、１０〜１５
ｍピッチ毎に、本発明に係わるクラック発生部材４が配
設される。In FIG. 1A, a building 1 is, for example,
A 45m x 75m flat, 35m high space with a 2m thick floor,
It is a huge box made of mass concrete, such as 2 m thick walls and 1.3 m thick ceiling. A radiation source 2 is arranged in a building 1, and a predetermined position in a wall 3, 10 to 15
The crack generating member 4 according to the present invention is provided for every m pitches.
【０００８】図１（Ｂ）および図１（Ｃ）において、壁
３は、縦筋５ａおよび横筋５ｂからなる壁主筋とコンク
リート６からなる。図１（Ａ）のクラック発生部材４
は、壁３の内側および外側に配設されるクラック発生部
材４ａとクラック発生部材４ｂとからなり、両クラック
発生部材４ａ、４ｂは、壁３の外面から壁３の内部に向
かって延び、かつ間隔を離して対向するように配置さ
れ、また、内側のクラック発生部材４ａと外側のクラッ
ク発生部材４ｂは、発生するクラックが、直接、放射線
源２を見通せないように、水平方向に距離Ｌ（例えば５
０ｍｍ程度）だけずらして横筋５ｂに固定される。ま
た、必要に応じてクラック発生部材４ａ、４ｂと縦筋５
ａとの間に補強部材７が設けられている。さらに、内側
クラック発生部材４ａと外側クラック発生部材４ｂの外
側には、無収縮性モルタルからなる目地部材８が充填さ
れる。In FIG. 1B and FIG. 1C, the wall 3 is composed of a main wall composed of a vertical bar 5 a and a horizontal bar 5 b and concrete 6. Crack generating member 4 in FIG.
Comprises a crack generating member 4a and a crack generating member 4b disposed inside and outside the wall 3, and both of the crack generating members 4a and 4b extend from the outer surface of the wall 3 toward the inside of the wall 3, and The inner crack generating member 4a and the outer crack generating member 4b are arranged so as to face each other with a distance therebetween, so that the generated crack cannot be directly seen through the radiation source 2 so that the distance L ( For example, 5
(About 0 mm) and fixed to the horizontal streak 5b. If necessary, the crack generating members 4a and 4b and the vertical streaks 5
and a reinforcing member 7 is provided therebetween. Further, the joint members 8 made of non-shrinkable mortar are filled outside the inner crack generating member 4a and the outer crack generating member 4b.
【０００９】クラック発生部材４ａ、４ｂは、図１
（Ｃ）に示すように、幅Ｗ（壁厚２ｍに対して３０ｃｍ
程度）、厚み２ｍｍ程度のプレート形状のプレート部９
を有し、プレート部９に櫛状に幅５０ｍｍ程度の切欠部
１０をピッチ１５０ｍｍ程度で形成しており、この切欠
部１０を横筋５ｂに挿入固定している。クラック発生部
材４ａ、４ｂの材質は、図１（Ａ）に示す非磁性タイプ
の範囲ではステンレス製（例えばＳＵＳ−３０４）を使
用し、その他の箇所では亜鉛引鉄板を使用する。The crack generating members 4a and 4b are shown in FIG.
As shown in (C), the width W (30 cm for a wall thickness of 2 m)
Plate part 9 having a plate shape with a thickness of about 2 mm.
A notch 10 having a width of about 50 mm is formed in the plate portion 9 in a comb shape at a pitch of about 150 mm, and the notch 10 is inserted and fixed to the horizontal streak 5b. The material of the crack generating members 4a and 4b is made of stainless steel (for example, SUS-304) in the range of the non-magnetic type shown in FIG. 1A, and a zinc-iron plate is used in other places.
【００１０】本発明においては、壁３におけるコンクリ
ート打設後、コンクリートに作用する応力は、内側のク
ラック発生部材４ａと外側のクラック発生部材４ｂ間に
作用するため、図１（Ｂ）に示すように、両者の間のみ
にクラックを意図的に発生させることができる。このと
き、クラック発生部材４ａとクラック発生部材４ｂは、
水平方向に距離Ｌだけずらして配置されているため、図
２に示すように、発生するクラック１１が、直接、放射
線源２を見通せないようになっているため、放射線の漏
洩を防止することができる。また、クラックの発生位置
をコントロールすることができるため、その位置に目地
部材８を配設することにより、外壁からの漏水を防止す
ることができる。In the present invention, after the concrete is cast on the wall 3, the stress acting on the concrete acts between the inner crack generating member 4a and the outer crack generating member 4b, and as shown in FIG. In addition, a crack can be intentionally generated only between the two. At this time, the crack generating members 4a and 4b
As shown in FIG. 2, since the cracks 11 are horizontally displaced by the distance L, the generated cracks 11 cannot directly see through the radiation source 2, so that leakage of radiation can be prevented. it can. In addition, since the position where the crack occurs can be controlled, water leakage from the outer wall can be prevented by disposing the joint member 8 at that position.
【００１１】[0011]
【発明の効果】以上の説明から明らかなように本発明に
よれば、コンクリート構造の所定位置に品質を損なうこ
とのないクラックを意図的に発生させ、放射線源を直接
見通せないようにすることにより、放射線の漏洩を防止
し放射線を安全に管理することができる。As is apparent from the above description, according to the present invention, cracks can be intentionally generated at a predetermined position in a concrete structure without deteriorating the quality, so that the radiation source cannot be directly seen through. In addition, radiation can be prevented and radiation can be safely managed.
【図１】本発明の放射線遮蔽用コンクリート構造の１実
施例を示し、図１（Ａ）は建物全体の水平断面図、図１
（Ｂ）は図１（Ａ）のＢ部の拡大断面図、図１（Ｃ）は
図１（Ｂ）のＣ−Ｃ線に沿って矢印方向に見た断面図で
ある。1 shows an embodiment of a concrete structure for radiation shielding according to the present invention, wherein FIG. 1 (A) is a horizontal sectional view of the whole building, FIG.
1B is an enlarged cross-sectional view of a portion B in FIG. 1A, and FIG. 1C is a cross-sectional view taken along a line CC in FIG.
【図２】本発明におけるクラックの発生状態を示す図で
ある。FIG. 2 is a diagram showing a state of occurrence of cracks in the present invention.
１…建物、２…放射線源、３…壁、４、４ａ、４ｂ…ク
ラック発生部材 ５ａ…縦筋、５ｂ…横筋、６…コンクリート、７…補強
部材、８…目地部材 ９…プレート部、１０…切欠部DESCRIPTION OF SYMBOLS 1 ... Building, 2 ... Radiation source, 3 ... Wall, 4, 4a, 4b ... Crack generating member 5a ... Vertical streak, 5b ... Horizontal streak, 6 ... Concrete, 7 ... Reinforcement member, 8 ... Joint member 9 ... Plate part, 10 … Notch
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｇ２１Ｆ 3/00 Ｇ２１Ｆ 3/00 Ｚ (58)調査した分野(Int.Cl.7，ＤＢ名) E04B 1/62 E04B 1/92 E04B 2/84 E04H 9/14 G21F 3/00 ──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 7 identification code FI G21F 3/00 G21F 3/00 Z (58) Field surveyed (Int.Cl. 7 , DB name) E04B 1/62 E04B 1 / 92 E04B 2/84 E04H 9/14 G21F 3/00
Claims (2)
び外側に配設されるプレート形状のクラック発生部材を
備え、両クラック発生部材は互いに壁の外面から壁の内
部に向かって延び、かつ、その先端を間隔を離して対向
するように配設されるとともに、両クラック発生部材
は、発生するクラックが、直接、放射線源を見通せない
ように、水平方向に所定の距離だけずらして配置される
ことを特徴とする放射線遮蔽用コンクリート構造。 A crack-generating member in the form of a plate disposed inside and outside a predetermined position of a wall of a concrete structure, wherein both of the crack-generating members extend from an outer surface of the wall toward the inside of the wall, and The two crack generating members are arranged so as to be opposed to each other at a distance from each other, and are displaced by a predetermined distance in the horizontal direction so that the generated cracks cannot be directly seen through the radiation source. A radiation shielding concrete structure characterized by the following.
設けることを特徴とする請求項１に記載の放射線遮蔽用
コンクリート構造。2. The radiation shielding concrete structure according to claim 1, wherein a joint member is provided outside the crack generating member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12921793A JP3309289B2 (en) | 1993-05-31 | 1993-05-31 | Radiation shielding concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12921793A JP3309289B2 (en) | 1993-05-31 | 1993-05-31 | Radiation shielding concrete structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06341175A JPH06341175A (en) | 1994-12-13 |
| JP3309289B2 true JP3309289B2 (en) | 2002-07-29 |
Family
ID=15004039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12921793A Expired - Fee Related JP3309289B2 (en) | 1993-05-31 | 1993-05-31 | Radiation shielding concrete structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3309289B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5219252B2 (en) * | 2008-03-13 | 2013-06-26 | 大成建設株式会社 | Construction method of concrete structure |
-
1993
- 1993-05-31 JP JP12921793A patent/JP3309289B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06341175A (en) | 1994-12-13 |
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